:root{color-scheme:light;--letter-red:#d83540;--letter-ink:#30262a;--letter-muted:#86777c;--letter-line:#efdee2}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
[hidden]{display:none!important}
body{margin:0;background:#f8f4f4;color:var(--letter-ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}
button,a{-webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer}
a:focus-visible,button:focus-visible{outline:3px solid #e97b83;outline-offset:3px}
.letter-shell{max-width:520px;margin:0 auto;min-height:100vh;min-height:100svh;background:linear-gradient(180deg,#fff7f8,#fbf9f9 280px);box-shadow:0 0 40px #3c172207}
.letter-nav{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;min-height:calc(64px + env(safe-area-inset-top,0px));padding:calc(12px + env(safe-area-inset-top,0px)) 20px 12px;border-bottom:1px solid var(--letter-line);background:#ffffffed;backdrop-filter:blur(12px);font-weight:600;font-size:17px}
.letter-nav img{object-fit:contain}.letter-back{display:grid;place-items:center;width:34px;height:38px;margin-left:-6px}.letter-back svg{width:24px;height:24px}
.letter-main{padding:18px 14px calc(30px + env(safe-area-inset-bottom,0px))}
.letter-state{margin-top:28px;padding:40px 22px;text-align:center;border:1px solid var(--letter-line);border-radius:20px;background:#fff}
.letter-state-mark{display:grid;place-items:center;width:64px;height:64px;margin:0 auto 18px;border-radius:18px;background:#fff0f2;color:var(--letter-red);font-family:"Songti SC",SimSun,serif;font-size:30px}
.letter-state h1{margin:0 0 12px;font-size:20px}.letter-state p{margin:0;color:var(--letter-muted);line-height:1.8;font-size:14px;overflow-wrap:anywhere}
.letter-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin-top:24px}.letter-actions a,.letter-actions button{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:9px 20px;border:1px solid var(--letter-red);border-radius:10px;background:var(--letter-red);color:#fff;font-size:14px}.letter-actions .secondary{background:#fff;color:var(--letter-red)}
.letter-document{padding:27px 24px 24px;border:1px solid #eadbdf;border-top:3px solid var(--letter-red);border-radius:16px;background:#fff;box-shadow:0 6px 22px #3c172204}
.letter-document h1{margin:0 0 10px;text-align:center;font-size:28px;letter-spacing:5px;font-family:"Songti SC",SimSun,serif;font-weight:700}
.letter-firm-heading{text-align:center;margin:0 0 26px;padding-bottom:18px;border-bottom:1px solid #e7b9bf;font-size:13px;color:#65585e;line-height:1.7;overflow-wrap:anywhere}
.letter-addressee{margin:0 0 16px;font-weight:700;line-height:1.9;font-size:15px;overflow-wrap:anywhere}
.letter-paragraph{margin:0 0 16px;font-family:"Songti SC",SimSun,"PingFang SC",sans-serif;font-size:15px;line-height:2.05;text-align:justify;overflow-wrap:anywhere;white-space:pre-wrap}
.letter-closing{margin:0 0 6px;font-family:"Songti SC",SimSun,serif;font-size:15px;line-height:2}
.letter-signature{position:relative;isolation:isolate;min-height:170px;margin-top:24px;display:flex;flex-direction:column;justify-content:flex-end;align-items:flex-end;padding:12px 0 15px}
.letter-signature p{z-index:1;position:relative;margin:5px 0;text-align:right;line-height:1.6;font-size:14px;overflow-wrap:anywhere}.letter-seal{position:absolute;right:8px;top:0;width:132px;height:132px;object-fit:contain;z-index:0;pointer-events:none}
.letter-noscript{padding:15px;color:#a1222e;background:#fff}
@media(max-width:360px){.letter-main{padding-left:10px;padding-right:10px}.letter-document{padding:24px 17px 20px}.letter-paragraph{font-size:14px}.letter-document h1{font-size:26px}.letter-firm-heading{font-size:12px}}
@media print{body,.letter-shell{background:#fff;box-shadow:none;max-width:none}.letter-nav,.letter-state,.letter-actions{display:none!important}.letter-main{padding:0}.letter-document{border:0;box-shadow:none;padding:12mm;break-inside:auto}.letter-signature{break-inside:avoid}.letter-paragraph{font-size:12pt}}